arm64: dts: renesas: white-hawk: ethernet: Describe AVB1 and AVB2

arm64: dts: renesas: white-hawk: ethernet: Describe AVB1 and AVB2

Describe the two Marvell 88Q2110/QFN40 PHYs available on the R-Car V4H
White Hawk RAVB/Ethernet(1000Base-T1) sub-board. The two PHYs are wired
up on the board by default, there is no need to move any resistors which
are needed to access other PHYs available on this sub-board.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240413141806.300989-3-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>